Re: [PATCH 04/23] scsi: initialize scsi midlayer limits before allocating the queue

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Michael Ellerman <mpe@xxxxxxxxxxxxxx> writes:
> "Linux regression tracking (Thorsten Leemhuis)" <regressions@xxxxxxxxxxxxx> writes:
>> [CCing the regression list, as it should be in the loop for regressions:
>> https://docs.kernel.org/admin-guide/reporting-regressions.html]
>>
>> On 20.05.24 17:15, Christoph Hellwig wrote:
>>> Adding ben and the linuxppc list.
>>
>> Hmm, no reply and no other progress to get this resolved afaics. So lets
>> bring Michael into the mix, he might be able to help out.
>
> Sorry I didn't see the original forward for some reason.
>
> I haven't seen this on my G5, but it's hard drive is on SATA. I think
> the CDROM is pata_macio, but there isn't a disk in the drive to test
> with.
>
>> BTW TWIMC: a PowerMac G5 user user reported similar symptoms here
>> recently: https://bugzilla.kernel.org/show_bug.cgi?id=218858
>
> AFAICS that report is from a 4K page size kernel (Page orders: ...
> virtual = 12), so there must be something else going on?

No that's wrong. The actual hardware page size is 4K, but
CONFIG_PAGE_SIZE and PAGE_SHIFT etc. is 64K.

So at least for this user the driver used to work with 64K pages, and
now doesn't.

cheers




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